Job Description

About GreenMars Real Estate Services Inc.

GreenMars is a mission-driven real estate development and services firm based in Portland, Maine. Our core mission is to optimize housing developments to increase the number of homes added to the market in Maine and the broader New England area, helping alleviate the supply side of the housing crisis. We strive to make units as affordable as possible within project constraints. While primarily focused on residential development, we also work across commercial, industrial, retail, and mixed-use categories. As a startup entering its fourth year in 2026, we're scaling rapidly--from about 10 employees mid-2025 to over 20 by the end of 2026--with an exciting pipeline fueling continued acceleration. Joining us means embracing a fun, dynamic startup culture with flexible schedules, easy PTO, great benefits, and plenty of opportunities to make an impact.

Job Summary

We're seeking a high-energy Executive Assistant / Office Manager to support our founding team and keep our operations running smoothly. This role reports primarily to one founding member, with additional support for others as needed, and includes fundamental office management duties. You'll gain exposure to all founders, investors in GreenMars and our projects, and our sister company, Acadia Realty Partners, which raises and allocates capital across our developments. If you thrive in a fast-paced startup environment--where a bit of chaos meets rapid growth and innovation--this is your chance to contribute to meaningful real estate solutions while building structure in an early-stage company.

Key Responsibilities

Executive Support: Manage calendars, schedule meetings, and coordinate communications for founding members. Handle occasional travel arrangements and prepare materials as needed. Office Management: Oversee office supplies, facilities maintenance, vendor relationships, and general upkeep to ensure a productive workspace. Event Coordination: Plan and execute internal events, such as happy hours, milestone celebrations, and birthday recognitions, to foster team morale. Administrative Support: Assist with ad-hoc tasks across the organization, including participation in Acadia Realty Partners activities. While client-facing work is rare, flexibility to step in on short notice is key--we provide ample support and resources to set you up for success. General Duties: Tackle small, essential tasks to maintain smooth operations, adapting quickly to evolving needs in a startup setting.

Qualifications

Open to candidates at any experience level; compensation will vary based on background. High energy with a "get-it-done" attitude and the ability to learn new things rapidly on the go. Strong organizational skills, attention to detail, and the capacity to multitask in a dynamic environment. Comfort thriving in a low-structure world while helping build processes--ideal for those who love startup chaos over rigid corporate setups. Proficiency in standard office tools (e.g., Microsoft Office or Google Workspace) is a plus; real estate-specific knowledge is not required but welcomed. Ability to maintain discretion with sensitive information involving founders, investors, and projects.

Work Arrangement

This is a full-time role with standard hours from 8 AM to 5 PM, primarily in our Portland, Maine office, though partial remote work is possible. Occasional off-hours work may be needed for evening meetings or urgent issues, but it's not the norm--even our founders prioritize work-life balance and family time most evenings.

Benefits

Comprehensive health insurance: Gold-level group plan with 80% employer coverage for employees and 50% for family members. Unlimited PTO policy, as long as performance goals are met and responsibilities are handled. 401(k) plan available starting in 2026. Discretionary annual bonuses to reward long-term commitment and contributions.
At GreenMars, we value individuals who are excited by the startup vibe--where innovation, flexibility, and impact come together to drive real change in housing affordability.

GreenMars Real Estate Services Inc. is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate on the basis of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity, or any other protected characteristic under applicable law.

Pay: $54,390.09 - $70,000.00 per year

Benefits:

401(k) Dental insurance Flexible schedule Health insurance Paid time off Professional development assistance Relocation assistance Retirement plan Vision insurance
Work Location: Hybrid remote in Portland, ME 04101